Excitation system for a synchrotron

THE EXCITATION of a 70 mega-electron volt synchrotron magnet involves single-phase supply of loss energy to a tuned circuit, usually resonant at 60 cycles, wherein approximately 3,000 kva are circulating. This resonant circuit has a XL/R ratio or Q of approximately 100, thus the frequency sensitivity of the circuit is quite great, and it usually is considered necessary that the input frequency be held within ±0.3 cycle of the magnet circuit resonant frequency.